What was found
AIRCRAFT EXPERIENCED ELECTRICAL FAILURE IN-FLIGHT. BOTH GENERATORS DROPPED OFF LINE. SWITCHED TO EMERGENCY BUS AND LANDED WITHOUT FURTHER PROBLEMS. TROUBLESHOT SYSTEM AND WAS UNABLE TO DETERMINE EXACT PROBLEM. INSTALLED NEW GENERATORS SAME PN 6058003-1 LEFT AND RIGHT AND REPAIRED GCU'S SAME P/N GCSG505-16B. PARALLELED GENERATORS AND OPERATIONAL CHECKS WERE GOOD. LEARJET TUCSON RECOMMENDED REPLACEMENT OF ALL 4 COMPONENTS. TSN AIRCRAFT AND COMPONENTS, 305.9 HOURS S/N'S OFF, START/GEN 1307 AND 1274. GCU'S, 1090B AND 1085B.